number validation

The basic code to do that is simple, but the issue is you didn't name your field very consistently, so you would have to adjust the code for each individual set... You can use a doc-level function for generic script, and then call it from each field, like this:

function validateOnHand(toOrderFieldName) {
	if (event.value=="") return;
	var toOrderField = this.getField(toOrderFieldName);
	if (toOrderField==null) {
		console.println("Error! Can't find the field: " + toOrderFieldName);
		return;
	}
	var toOrderValue = Number(toOrderField.valueAsString);
	if (event.value>toOrderValue) {
		app.alert("Error! Maximum allowed value: " + toOrderValue);
		event.rc = false;
	}
}

And then you would call it from the Validation event of the first field in the file, for example, like this:

validateOnHand("Text1");